Latest Technology version Beta provides new video editing tool. You can update tool from Light works beta with Free of cost. This whole is based upon new Timeline Editing process.
Insert, Overwriting Editing, Replace, Fit to fill, Backfill, Drag and drop replace editing, Extend, Split Edits, Real time effects, Keyframe Graphs types of options available in this site.
Visit to know more details on http://lightworksbeta.com